Support for incandescent-lamp filaments.



G. W. BEADLE.

SUPPORT FOR INGANDESGENT LAMP PILAMENTS. APPLICATION FILED JULY1Q,190&

1,046,722. 7 Patented Dec. 10, 1912.

WITNESSES:

(WA: J.

AiTORNEY V iNVENTOR WM Y UNITED strAtrEs rnrnn'r orieic GEORGE, IBEADLE, OE'EAST ORANGE, NEW JERSEY, ASSIGNOR TO WESTINGHOUSE LAM COMPANY, A CORPORATION OF PENNSYLVANTA.

sorrow roe INGANDESCENT-LAMP rrnnmnnrs.

My invention relates to incandescent lamps, ai'id particularly to lamps having tu- I bular casings and filaments stretched between its ends.

The. object of the inventioh is to provide simple. and etl'ective means for supporting the filaments of lamps ofthe character indieatedwut of engagement with the bulbs or tubular casings and substantially central therein,

In la'mps haying tubular casings or bulbs, and filament-s stretched between their ends, it is ,nsually necessary to provide means for r'naintaining the filaments out of engagement with, and approximately central within, the casings. This has heretofore been effected by means of supporting devices or anchors that have been clamped or otherwise secured to the casings, or that havebeen interposed between and mechanically connected to adjacent filament sections.

When the anchors are secured to the casings, .much difficulty is often experienced in v placing them in position and in inserting the filaments into the casings, while if the anchors are adapted to be placed between filament sectiOnS,;& Continuous filament cannot be employed inconnection therewith. The present device or anchor is intende'lfor employment in connectionywith a continuous filament and/may be applied thereto at L iy convenientpoint, and if; is' adapted to be pasted or otherwise secured directly to the filament softhat it may be inserted intothe basing simultaneously with the filament.

Figural of the accompanying drawing is 3 a sidevi ew, of a lamp embodying the'present inveniionj andiFig. 2 is an enlarged sectional v ew of'thelainp on the line lIL-H of of a tubular casing or bulb 1 of the lamp is a filament 2 having an intermediate portion 3 in the form of an extended helix, or many other suitable. formv whlch' will permit of Specification of Letters Patent 7 Application filed July 19, 1909. Serial No. 508,539.

Extendingand stretched between the. ends ment upon heating and cooling. The filamentis supported out of engagement with Patented Dec. 10, 1912. 7

ready expansion and contraction ofthe filathe sides of the tubular casing and approxiniately central therein by means of supporting devices or anchors 4, two of which are employed in the present instance, spaced at points approximately one-third the length of the filament from its ends.

Each of the supporting devices or anchors consists of a reversely' bent strip .or wire having its ends bent apart to form a substantially Y-shaped member, the filament being straddled and embraced by and pasted to the adjacent parallel portions thereof. The supporting devices are freely movable within the casing, and, since they are pasted to the filament, they may be inserted in the casing simultaneously with the filament, no subsequent spacing or adjustment thereof being necessary. I claim as my invention:

1. An incandescent lamp comprising a tu-- bular lie-sing, a filament extending from end to end thereof, and a supporting member freely movable within the casing and pasted iv to the filament and extending laterally there-' from.

2. An incandescent lamp comprising a tubular casing, a filament extending from end to endthereof, and a substantially Y-shaped supporting member pasted near its center to the filament.

3. An incandescent lamp comprising a tubular casing, a filament extending'from end to end thereof, and a supporting member for the filament consisting of a reversely bent strip having its ends bent apart, said member being pasted near its center to the filament.

' 4. An incandescent lamp comprising a tubular casing, a filament extending from end to end thereof, and a supporting member for the filament consisting of a reversely bent strip that straddlesand embraces the filament and is pasted thereto;

In testimony whereof, I have hereunto subscribed my name this 7 day of July, 1909.

GEORGE W. BEADLE. 

